<template>
  <!-- 添加和修改章节表单 -->
  <el-dialog :visible="dialogVisible" title="添加章节" @close="close()">
    <el-form :model="chapter" label-width="120px">
      <el-form-item label="章节标题">
        <el-input v-model="chapter.title" />
      </el-form-item>
      <el-form-item label="章节排序">
        <el-input-number v-model="chapter.sort" :min="0" />
      </el-form-item>
    </el-form>
    <div slot="footer" class="dialog-footer">
      <el-button @click="close()">取 消</el-button>
      <el-button type="primary" @click="saveOrUpdate()">确 定</el-button>
    </div>
  </el-dialog>
</template>

<script>
  import {
    save,
    getById,
    updateById
  } from '@/api/chapter'

  export default {

    data() {
      return {
        dialogVisible: false,
        chapter: {
          sort: 0
        }
      }
    },

    methods: {
      save() {
        this.chapter.courseId = this.$parent.$parent.courseId
        save(this.chapter).then(response => {
          this.$message.success(response.message)
          // 关闭组件
          this.close()
          // 刷新列表
          this.$parent.fetchNodeList()
        })
      },

      open(chapterId) {
        this.dialogVisible = true
        if (chapterId) {
          getById(chapterId).then(response => {
            this.chapter = response.data
          })
        }
      },

      close() {
        this.dialogVisible = false
        // 重置表单
        this.resetForm()
      },

      resetForm() {
        this.chapter = {
          sort: 0
        }
      },

      saveOrUpdate() {
        if (!this.chapter.id) {
          this.save()
        } else {
          this.update()
        }
      },

      update() {
        updateById(this.chapter).then(response => {
          this.$message.success(response.message)
          // 关闭组件
          this.close()
          // 刷新列表
          this.$parent.fetchNodeList()
        })
      }
    }
  }
</script>

<style>
</style>
